Filter having corrugated nonwoven webs of polymeric microfiber
US5763078A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Dec 17, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/627
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter that is capable of removing particulate and gaseous contaminants from a fluid, which filter comprises: PA1 a first filter element that is capable of removing particulate contaminants from a fluid, the first filter element comprising a corrugated nonwoven web of polymeric microfiber having a solidity of 0.1 or less and a means for retaining the corrugated shape of the corrugated nonwoven web of polymeric microfiber, the shape-retaining means being secured to the corrugated nonwoven web to maintain the corrugated shape of the corrugated nonwoven web of polymeric microfiber, and PA1 a second filter element comprising a sorbent material capable of removing gaseous contaminants from a fluid; PA1 the first and second filter elements being secured to each other and having a shape adapted for attachment to a respirator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.